Choose File > Save to automatically save the image with the same file name and location (this will overwrite the original image with the modified image; or
Click the Save
button 
on the Standard toolbar; or
Press Ctrl + S.
You can easily save an image with the same file name and location. Note that this will overwrite the original image with the modified image. To save the image using a different name or file format, choose File > Save As.
Save an image using one of these methods:
Choose File > Save to automatically save the image with the same file name and location (this will overwrite the original image with the modified image; or
Click the Save
button on the Standard toolbar; or
Press Ctrl + S.
Saving an Image File in its Original Format
Saving an Image File in a New File Format